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<h1><a class="toc-backref" href="./trivial.html#id1560">Trivial Metafunctions Summary</a></h1>
<p>In the following table, <tt class="literal"><span class="pre">x</span></tt> is an arbitrary class type.</p>
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<tr><td><tt class="literal"><span class="pre">first&lt;x&gt;::type</span></tt></td>
<td><tt class="literal"><span class="pre">#include &lt;<a href="../../../../boost/mpl/pair.hpp" class="header">boost/mpl/pair.hpp</a>&gt;</span></tt></td>
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<tr><td><tt class="literal"><span class="pre">second&lt;x&gt;::type</span></tt></td>
<td><tt class="literal"><span class="pre">#include &lt;<a href="../../../../boost/mpl/pair.hpp" class="header">boost/mpl/pair.hpp</a>&gt;</span></tt></td>
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<tr><td><tt class="literal"><span class="pre">base&lt;x&gt;::type</span></tt></td>
<td><tt class="literal"><span class="pre">#include &lt;<a href="../../../../boost/mpl/base.hpp" class="header">boost/mpl/base.hpp</a>&gt;</span></tt></td>
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<h3><a class="subsection-title" href="#see-also" name="see-also">See Also</a></h3>
<p><a class="reference internal" href="./metafunctions.html">Metafunctions</a>, <a class="reference internal" href="./trivial-metafunction.html">Trivial Metafunction</a></p>
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